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CS5320 데이터시트(PDF) 87 Page - Applied Micro Circuits Corporation

부품명 CS5320
상세설명  PCI Match Maker, 3.3V
PDF  160 Pages
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제조업체  AMCC [Applied Micro Circuits Corporation]
홈페이지  http://www.amcc.com
Logo AMCC - Applied Micro Circuits Corporation

CS5320 데이터시트(HTML) 87 Page - Applied Micro Circuits Corporation

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S5320 – PCI Match Maker: Initialization
Revision 5.03 – June 14, 2006
AMCC Confidential and Proprietary
DS1656
87
Data Sheet
Figure 43. Type 0 Configuration Write Cycles
EXPANSION BIOS ROMS
This section provides an example of a typical PC-com-
patible expansion BIOS ROM. Address offsets 040h
through 07Fh represent the portion of the external nv
memory used to boot-load the S5320 controller.
Whether the expansion ROM is intended to be execut-
able code is determined by the contents of the first
three locations (starting at offset 0h) and a byte check-
sum over the defined length. The defined length is
specified in the byte at address offset 0002h. Table 39
lists each field location by its address offset, its length,
its value, and description.
The following represents the boot-load image for the
S5320 controller’s PCI configuration register:
PCI CLK
FRAME#
AD[31:0]
C/BE[3:0]#
IRDY#
TRDY#
IDSEL
0
1
2
3
4
5
DEVSEL#
ADD
DAT A
1011
BYT E EN
Table 39. PC Compatible Expansion ROM
Byte Offset
Byte Length (decimal)
Binary Value
Description
Example
0h
1
55h
BIOS ROM signature byte 1
55h
1h
1
AAh
BIOS ROM signature byte 2
AAh
2h
1
variable
Length in multiples of 512 bytes
01h
3h
4
variable
Entry point for INIT function.
7h-17h
17
variable
Reserved (application unique data)
18h-19h
2
variable
Pointer to PCI Data Structure
1Ah-3Fh
38
variable
user-defined
40h
2
Vendor ID
(see page 2-23)
10E8h
42h
2
Device ID
(see page 2-24)
5920h
44h
1
not used
xxh
45h
1
S5320 Special
Modes
(see page 2-89 and 2-129)
01h
46h
2
not used
xxxxh
48h
1
Revision ID
(see page 2-29)
00h
49h
3
class code
(see page 2-30)
FF0000h
4Ch
1
not used
xxh
4Dh
1
not used
xxh
4Eh
1
your header
type
(see page 2-37)
00h
4Fh
1
self-test, if
desired
(see page 2-38)
80h or 00h



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